Press Green Flag. Pressing Stop deletes pattern. It takes a few seconds for the design you see in the Project screenshot to develop, you can tell because the squares move slower and appear to be backed up. Press Space to see the Screenshot again. Rainbow version: https://scratch.mit.edu/projects/803477040/
So often, playing around with the blocks ends up with such surprising results. Case in point: Totally a surprise at the effect these blocks have on design. I was looking for a way to not have the farthest back (biggest) square delete so abruptly, I felt it was very jarring. I thought about the Ghost Graphic Effect. It then slows down the deleting and adds layers of squares to the program. I left the original stack in coding area, so if you want to see that one, just attach When I start as a clone Control block to that stack.
